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- W2556673471 abstract "We describe a nonnegative variant of the “Sparse PCA” problem. The goal is to create a low dimensional representation from a collection of points which on the one hand maximizes the variance of the projected points and on the other uses only parts of the original coordinates, and thereby creating a sparse representation. What distinguishes our problem from other Sparse PCA formulations is that the projection involves only nonnegative weights of the original coordinates — a desired quality in various fields, including economics, bioinformatics and computer vision. Adding nonnegativity contributes to sparseness, where it enforces a partitioning of the original coordinates among the new axes. We describe a simple yet efficient iterative coordinate-descent type of scheme which converges to a local optimum of our optimization criteria, giving good results on large real world datasets." @default.
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- W2556673471 date "2007-01-01" @default.
- W2556673471 modified "2023-09-23" @default.
- W2556673471 title "Nonnegative Sparse PCA" @default.
- W2556673471 hasPublicationYear "2007" @default.
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